Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bc7df93683273f6…

MALICIOUS

PDF

46.1 KB Created: 2020-08-07 06:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3a597aa0d386dba3b7a008023d0f3a0 SHA-1: f72b79b97bcc39c838c418ec15ba19a7ca7d0593 SHA-256: 7bc7df93683273f604cbd574b230ee2c42673864c50e01a3d527fdb12ce752c2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to paraphrasing and includes the same malicious URL. This suggests the document's primary purpose is to trick users into visiting a malicious site via a deceptive lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=paraphrasing+sentences+examples+pdf
    • http://files.nancythomas.org/uploads/1/3/1/3/131379223/tivowilibomoti.pdf
    • http://files.surrenderedtochrist.org/uploads/1/3/2/6/132681656/wulegi.pdf
    • http://files.mrmacbible.org/uploads/1/3/1/6/131606262/1033041.pdf
    • http://files.michaelallensalsbury.com/uploads/1/3/0/9/130969966/6271375.pdf
    • https://cdn.shopify.com/s/files/1/0433/5697/9351/files/soler.pdf
    • https://cdn.shopify.com/s/files/1/0432/4481/4500/files/selatokunif.pdf
    • https://cdn.shopify.com/s/files/1/0432/0421/4942/files/gegukujezifuviv.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/mimuvexewigugimume.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/wimitirujarewalufogaduz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/zawul.pdf
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/8596567396.pdf
    • https://cdn.shopify.com/s/files/1/0428/9380/3679/files/adobe_illustrator_cs6_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/5999/4014/files/aegon_life_term_plan.pdf
    • https://cdn.shopify.com/s/files/1/0433/8827/2807/files/marginal_costing_formula.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2066/files/buroliduxinizobizifu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3427/0117/files/87816353525.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/sierra_bullets_reloading_data.pdf
    • https://cdn.shopify.com/s/files/1/0429/1887/1207/files/41111976323.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/zexivabajejerawev.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007695.bin
52279853063af2d81ab8c7c405e9e721715efb58ccd28ea9cdc60cef5df09c70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7695 5640 bytes
font_01_sfnt_off000089a5.bin
03d674e29cdf3c277159310ae1b828007c96fa6a3e4cc21a83c1346e62b6859f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89A5 9816 bytes

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